lets not get too carried away, they do have some limitations in performance engines.

when you use even a moderate street cam, idle quality and mixtures are quite poor due to the lack of (or fluctuations of) idle vacuum. once off idle though everything is OK. I think the lumpy idle was a major factor in the breaking engine mount problem I had.

The exposed fuel bowls are also very sensitive to heat soak, and fuel is prone to boiling or vaporising during extended idle periods in warm weather. This is more of a problem if you have extractors - which most of us would. Good heat sheilding and thermal wrapping the fuel bowls overcomes the problem pretty easily and cheaply.

On the up side, they are great for fuel economy, especially on the highway. And have very good low end transitional response.